Keep in mind when planting that Gros Vert de Laon is thought of as half hardy, so remember to watch your frost dates and ensure you have this plant protected when the temperature dips. Ensure your soil is loamy and sandy and has a ph of between 5.6 and 6.6 as Globe artichoke is a weakly acidic soil loving plant.
Try to ensure a gap of at least
1.95 feet (60.0 cm) when sowing to prevent overcrowding your seedlings. Soil temperature should be kept higher than
18°C / 64°F to ensure good germination.
By our calculations, you should look at sowing Gros Vert de Laon about 48 days before your last frost date.
Ensure that temperatures are mild and all chance of frost has passed before planting out, as Gros Vert de Laon is a half hardy plant.